The present invention relates to a breathable film comprising at least one biodegradable polymer, a process for producing the breathable film, the use of a surface-treated filler material product as filler in the breathable film, an article comprising the breathable film as well as the use of the breathable film in hygienic applications, medical applications, healthcare applications, filtration materials, geotextile products, agricultural applications, horticultural applications, clothing, footwear products, baggage products, household applications, industrial applications, packaging applications, building applications, or construction.

The present invention concerns a process for the preparation of flocculated filler particles, wherein at least two aqueous suspensions of at least one filler material and at least one flocculating additive are combined.

The present invention relates to a process for preparing a surface treated calcium carbonate-comprising material, a surface treated calcium carbonate-comprising material obtained by the process, an article comprising the surface treated calcium carbonate-comprising material, a polymer composition and the use of the surface treated calcium carbonate-comprising material in polymer applications.

The invention relates to a method for producing an implant which contains a composite powder comprising microstructured particles, obtainable by a method in which large polymer particles are bonded to small spherical calcium carbonate particles. Said calcium carbonate particles can be obtained by a method with the following steps: a) providing a calcium hydroxide suspension, b) introducing carbon dioxide or a carbon dioxide-containing gas mixture into the suspension from step a), and c) separating the calcium carbonate particles formed, while adding 0.3 wt.-% to 0.7 wt.-% of at least one amino trialkylene phosphonic acid.

A composite powder containing microstructured particles having inhibitory calcium carbonate, obtainable by means of a method in which large particles are combined with small particles, wherein the large particles have an average particle diameter within the range from 0.1 pm to 10 mm, the large particles comprise at least one polymer, the small particles are arranged on the surface of the large particles and/or distributed inhomogeneously within the large particles, the small particles comprise calcium carbonate particles, the small particles have an average particle size within the range from 0.01 pm to 1.0 mm,
wherein the small particles are obtainable by means of a method in which calcium carbonate particles are coated with a composition comprising, based on its total weight, at least 0.1% by weight of at least one weak acid.

The present invention relates to a method for producing mineral particles grinding a mineral material in the presence of a specific anionic polymer. The polymer used is obtained by means of polymerisation in the presence of sodium hypophosphite, disodium dipropionate trithiocarbonate and at least one radical-generating compound. The invention also relates to an aqueous composition comprising particles of ground mineral material and such a polymer, in particular a paper coating slip composition.

Provided is a calcium carbonate filler for resins that has uniform particles, high dispersibility and thermal stability, and, in particular, excellent smoothness, peelability, resistance to detachment, and the like and is useful as an antiblocking material. The calcium carbonate filler for resins includes calcium carbonate particles and satisfies formulae (a) to (e) below: (a) 1.0≤Sw≤12.0 (m.sup.2/g); (b) 0.1≤Dx≤5.0 (μm); (c) 0.1≤Dy≤5.0 (μm); (d) 0.8≤Dy/Dx≤3.5; and (e) 0.1≤Tw≤0.8 (% by weight), where Sw is a BET specific surface area (m.sup.2/g); Dx is a primary particle diameter (μm) expressed as a calculation formula: Dx=6/(2.7.Math.Sw); Dy is a 50% diameter (μm); and Tw is a thermal weight loss (% by weight) between 100 and 300° C.

Some embodiments of the invention include a process for the surface-treatment of a calcium carbonate-comprising material, a surface-treated calcium carbonate-comprising material obtained by such a process and the use of such a surface-treated calcium carbonate-comprising material.

The present invention relates to a process for preparing a surface treated filler material product, the surface treated filler material product as well as an article comprising the surface treated filler material product.

The invention relates to composite polymer modifiers for thermoplastic resins, and especially for polyvinyl chloride (PVC). The composite modifier is an intimate blend of mineral filler and polymeric process aid, which is formed by the co-powderization of aqueous emulsions, suspensions or slurries of one or more mineral filler(s) and process aid(s). The resulting composite modifier provides more effective modification of the thermoplastic resin than by the use of the dried components formed separately. The composite modifier may also contain other co-powderized components such as impact modifiers, for additional benefits.